VMM Convert Virtual Machine Error 3501 Not enough Disk Space

Trying to convert a virtual machine.

There is not enough disk space on the available volumes.
Maximum disk space on the most appropriate volume, accounting for the host resource utilization  (in megabytes): 218052 
The virtual machine requirement (in megabytes): 260116 
The maximum available space at the time of evaluation, after considering the virtual machine requirements (in megabytes): 218052
ID: 3501

BUT I have a Shared Cluster Volume mapped to C:\ClusterStorage\Volume1 with 10T of available space.

Found this link, but that work around is for a migration, not a conversion
http://social.technet.microsoft.com/Forums/en-US/virtualmachinemanager/thread/5410a1a1-684d-409c-a85b-0aed42ab089c/